Nearshore Currents

Oral

1490 - Non-Hydrostatic Modelling Of Kelvin-Helmholtz(KH) Billows Along The North Passage Of Yangtze River Estuary, China

Presenting Author(s)

• JS

  Jian Shi

  Hohai University

Additional Author #1(s)

• JZ

  Jinhai Zheng

Additional Author #2(s)

• CT

  Chaofeng Tong

Kelvin-Helmholtz (K-H) instability plays a significant role in the transit from stratification to mixing in estuaries. To investigate the existence of K-H instability , the non-hydrostatic model NHWAVE is utilized to simulate the mixing process along the North Passage of the Yangtze River Estuary. Using high horizontal resolution, the structure of K-H billows have been successfully captured within the Lower Reach of the North Passage.
The K-H instability occurs between the max flood and high-water slack. The horizontal length scale of the instability is about 60m, which is comparable with the observations in other estuaries.